Here's a good argument not to use IE: any
site you visit can access your system clipboard.
Firefox is here for a reason!
This page is a live demonstration
of this vulnerability. Make sure
that your clipboard is not empty
(has got some text in it)
and refresh this page.
If you're running on IE bellow
you will see the contents of your
clipboard.
If you have seen the contents of your
clipboard above this means that any
malicious site you have visited before
may also have gained access to it via
javascript and may have secretly posted
it back to its owner.